87 Blazer won't catch. Not relay or fuel pump – what else?
My '87 Blazer all of a sudden wouldn't start as described in this thread on this forum:
https://blazerforum.com/forum/1st-generation-s-series-1983-1994-tech-40/87-blazer-fuel-pump-relay-location-48533/ After thinking I had troubleshot it for a bad relay (as Ohsofly and Swartlkk advised in above thread) I replaced the relay with a new one and the car still won't start. Turns over great but makes no attempt to catch. This is what I have troubleshot so far:
Thanks for any leads! |
Problem Solved! ECM-1 fuse short
I wanted to post my success in determining the trivial problem causing my 87 Blazer not to start all of a sudden. I got really great help from this forum and I hope this will help someone else.
Having chased down all the leads here in 2 forum threads (#48533 & #50354) everything checked out (without advanced tools) but I kept hitting absolutely NO GO! A mechanic friend told me about the ECM-B fuse causing this problem on another Blazer he had worked on - which was fine on my truck - but right next to it is the ECM-1 fuse = and that was way blown! Scouting around here and googling for 'ECM 1 blown fuse' for this model I found this post: http://wiki.answers.com/Q/ECM1_blowi...991_S10_Blazer And that was exactly the problem - someone years ago had mashed the rubber connection on the positive lead off one of the throttle body injectors and it had finally worn/melted through shorting out to ground on the air cleaner housing. So I spliced and insulated that back together, replaced the fuse, truck started right up! Total cost (not counting my educational labor!) less than a buck! So I hope I put enough keywords in this to help someone here find this possible solution directly - all our problems should be so simple to solve! [An administrator can close this thread if they want.] |
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